Optical structures



5 5- An o tical structure as claimed in c]aim 1 wherein Said articles are ca able of uorescin in fes onse to inumination.

G An o tical Structure as claimed in claim 1 Wherein: said articles are from about 1 to about 4 microns in diameter, said articles are in contact with one another, Said particles and Said body are clear and transparent to visible illumination, and said bod is a 1at lanar bod UNITED STATES PATENTS 2,379,74l 7/194S Palm uist 2071 X 2 48 S61 10/1949 Burrou hs 2507l X RALPH G NILSON, Primar Examiner D L WILLIS, Assistant Examiner U.S, C1. x.R. 

